| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | difficulty in [verb] [adv prt] [prep] the | 8 |
|
| 2 | difficulty in [verb] [adv prt] [prep] the | 8 |
|
| 3 | difficulty in [verb] [adv prt] to the | 5 |
|
| 4 | difficulty in [verb] [adv prt] to the | 5 |
|
| 5 | difficulty in [verb] [adv prt] the [noun sg] | 6 |
|
| 6 | difficulty in [verb] [adv prt] the [noun] | 6 |
|
